I have several shelly's installed in my house, type 1 and 2.5. Most of these are stuck at firmware 1.5.9 and report that this is the latest version. I have tried to update the firmware to the newest version with the ota update link found on this support site but no success.
Here is the url used and respons for the shelly1:
Here is the url used and respons for the shelly2.5:
How can I get these shelly's to the most recent firmware without physically removing them and manually updating the with a ftdi cable?